/*
 * Copyright 2013-2019 Xia Jun(3979434@qq.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ***************************************************************************************
 *                                                                                     *
 *                        Website : http://www.farsunset.com                           *
 *                                                                                     *
 ***************************************************************************************
 */
package com.workcell.workdata.im.repository.specification;


import com.workcell.workdata.im.entity.Moment;
import org.springframework.data.jpa.domain.Specification;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class MomentSpecification implements Specification<Moment> {


    private final List<Long> idList;

    private MomentSpecification(List<Long> idList) {
        this.idList = idList;
    }


    @Override
    public Predicate toPredicate(Root<Moment> root, CriteriaQuery<?> query, CriteriaBuilder builder) {

        List<Predicate> predicatesList = new ArrayList<>();

        predicatesList.add(root.get("uid").in(idList));

        query.where(predicatesList.toArray(new Predicate[0]));

        query.orderBy(builder.desc(root.get("createTime").as(Date.class)));

        return query.getRestriction();
    }


    public static MomentSpecification of(List<Long> idList) {
        return new MomentSpecification(idList);
    }


}
